Add RouteBuilderToCallbackFirstRector for CakePHP 6.0

[dereuromark]

Summary

This PR adds a new Rector rule to transform RouteBuilder method calls from the old argument order to the new CakePHP 6.0 order where callback comes second and params/options come third.

Affected methods:

• scope(path, callback, params = [])
• prefix(name, callback, params = [])
• plugin(name, callback, params = [])
• resources(name, callback = null, options = [])

Transformations:

// Before (CakePHP 5.x)
$routes->scope('/api', ['prefix' => 'Api'], function ($routes) { });
$routes->prefix('admin', [], function ($routes) { });
$routes->plugin('Blog', ['path' => '/blog'], function ($routes) { });
$routes->resources('Articles', ['only' => 'index']);

// After (CakePHP 6.0)
$routes->scope('/api', function ($routes) { }, ['prefix' => 'Api']);
$routes->prefix('admin', function ($routes) { });
$routes->plugin('Blog', function ($routes) { }, ['path' => '/blog']);
$routes->resources('Articles', null, ['only' => 'index']);

Changes:

• New RouteBuilderToCallbackFirstRector class
• New CakePHPSetList::CAKEPHP_60 constant
• New cakephp60.php set file
• Full test coverage with fixtures

Related:

• Remove argument overloading from RouteBuilder methods cakephp#19095

🤖 Generated with Claude Code

[dereuromark]

Claude on its own didnt understand what target it should use ;)